141. Задачка по химии №014 131

To determine calcium and magnesium, 2.0859 g of the mineral was taken and dissolved in a 250.0 ml volumetric flask. For titration of 25.00 ml of this solution, 11.20 ml of 0.05240 mol-eq / l of Trilon B solution was consumed, and for titration of 100.0 ml (after calcium separation), 21.65 ml was used. Calculate the mass fraction of calcium and magnesium in the sample.

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